TABLE VIII. 



SYSTEMATIC SURVEY OF THE PERIODS IN HUMAN GERM-HISTORY. 

 (Cf. Table XXII.) 



FIRST MAIN DIVISION OF GERM-HISTORY. 



Kan as a simple Flastid. 



The human embryo possesses the form-value of u simple individual of the 

 firot order of a single plastid. 



First Stage : Monerula Stage (Fig. 36, p. 210). 



The human germ is a simple cytod (the impregnated egg-cell after the 

 loss of the germ- vesicle). 



Second Stage: Cytula Stage (Fig. 37, p. 210). 



The human germ is a simple cell (the impregnated ovulc-ocll with the 

 re-formed kernel, or the parent-cell). 



SECOND MAIN DIVISION OF GERM-HISTORY. 



VIOL as a many-celled Primitive Amtpnl. 



The human embryo consists of many cells, which, however, nr jet form 

 110 organs; it therefore possesses the form-value of an individual of the 

 second order. 



Third Stage: Morula Stage (Fig. 40, p. 212, and PI. II. Fig. 14). 

 The human germ is a globular cell-mass, of which one hemisphere consists 

 of animal cells, the other of vegetative cells. 



Fourth Stage : Blastula Stage (PI. II. Fig. 16). 



The human germ is a vesicle, the wall of which consista of animal cells, 

 its contents of vegetative c*. 



